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Naval Postgraduate School
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This thesis deals with a simulation of a missile versus target engagement scenario. After driving simplified transfer functions for the missile seeker head, missile autopilot, missile dynamics, and target dynamics, a three dimensional simulation is developed using classical proportional navigation. The scenario is simulated using state variable design. A forward time solution of the two dimensional problem is developed which is converted to an adjoint model. The adjoint model is used to...
Topics: Guided missiles, Transfer functions, Dynamics, Time, Proportional navigation, Antiaircraft...
Naval Postgraduate School
by Chen, Chi-Shao
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The equatorial entrainment zone model of Garwood et al. (1989) is employed along with data collected by Moum et al. (1984) during the Tropic Heat I Experiment to explain how the dissipation of turbulence is related to surface forcing of wind stress and net heat flux. Four numerical experiments with different atmospheric conditions are conducted with the entrainment zone model. Solar radiation is diurnally repeated, and wind stress is held constant in the first case. The model is forced with...
Topics: Ocean-atmosphere interaction., Air-sea interaction, equatorial circulation
Naval Postgraduate School
by Nedresky, Donald L.
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An adaptive control system is a system that detects changes in the plant parameters and makes necessary adjustments to the systems performance. This thesis examines the use of parallel distributed processing systems (neural networks) in adaptive control. A general neural network structure is introduced and a description of the Backpropagation paradigm is given. A discussion of adaptive control theory including the one step ahead prediction control algorithm and the linear least squares...
Topics: Engineering, Aeronautics, Flight control., Neural Networks, Adaptive Control, Backpropagation,...
Naval Postgraduate School
by Hwang, J.S.
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A study of the shielded coplanar line (SCPL) is presented. The main goal of this theses is to develop an equivalent circuit model for a typical discontinuity in the SCPL. The formulation is based on Galerkin's method, using Green's function applied in the Fourier transform domain. The impedance (Z sub 0) has been calculated by using a variational method. The propagation constant (betaomega) and effective dielectric constant of the SCPL have been calculated by using a method of moments. The...
Topics: Boundary value problems., A discontinuity study in shielded coplanar line
Naval Postgraduate School
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This thesis is an analysis of flight hour cost variance in the Naval Air Reserve and Fourth Marine Aircraft Wing. The broad objective of the thesis was to identify and analyze factors hypothesized to cause variance in cost per flight hour. An overview of the Naval Air Reserve Force Structure and budgetary organizations is presented. The relatively recent shift in the use and role of reserve forces towards Total Force concept goals is highlighted. An interview process is described in which four...
Topics: Management, Budget., Naval Air Reserve, Flight Hour Program, Cost per Hour, Aviation Depot Level...
This thesis explores the effectiveness of the U.S. Navy's basic skills enhancement program entitled Functional Applied Skills Training (FAST) in providing the basic reading skills necessary for enlisted personnel to more ably perform their jobs in the U.S. Navy fleet during the first three years of their enlistment. Current FAST program mission, FAST's impact on fleet job performance, and future U.S. Navy enlisted manpower requirements are examined to identify mission areas where program...
Topics: Performance, Training, Employees., Basic Reading Skills, Fleet Performance Measures
Naval Postgraduate School
by Archer, Scott L.; Walker, John D.
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The study analyzes the performance of the Navy's Overseas Screening Policy for 1989, with specific emphasis on determining how many personnel were returned to the U.S. prior to the end of their tour. Overseas screening in its present form is the result of 16 years worth of development. the purpose of screening is to avoid sending members overseas with problems that cannot be handled by the overseas command. The data collected for this thesis included information on personnel incarcerated...
Topics: Sailors, Soldiers, Medical care
Naval Postgraduate School
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A lithium ion source using thermal emission from a Beta-eucryptite structure has been investigated as a possible control device for spacecraft charging. This source can be used for control of positively charged spacecraft potentials in sunlight and differentially charged spacecraft surfaces in shadow. This thesis investigates the emission characteristics of lithium ion sources in conjunction with two kinds of electron sources and simulates spacecraft charge control. A 0.6-in. lithium ion source...
Topics: Physics, Lithium, Space vehicles, Electrostatic charging., Satellite charge control, lithium ion...
Naval Postgraduate School
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A database management system (DBMS) can have numerous errors and inconsistencies in its data. Examples of errors and inconsistencies that may be contained in a DBMS are: Referential integrity violations, logical inconsistencies, redundancies and out-of-range values. During a conversion of database management systems, the errors and inconsistencies in the source system must be corrected so the data entered into the new target DBMS will be accurate. The goal of this thesis is to examine a source...
Topics: Databases, Errors., Database Conversion, Integrity Constraints, Errors, Inconsistencies, DBMS
Naval Postgraduate School
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Chaos is a discipline used in understanding complex nonlinear dynamics. The geometric and topological methods of Chaos theory are applied, for the first time, to the study of flight test data. Data analyzed is from the McDonnell Douglas OH-6A Higher Harmonic Control (HHC) test aircraft. HHC is an active control system used to suppress helicopter vibrations. Some of the first practical applications of Chaos methods are demonstrated with the HHC data. Although helicopter vibrations are mostly...
Topics: Aerodynamics, Helicopters, Helicopters,Flight testing, Lyapunov functions., Chaos, Higher Harmonic...
Naval Postgraduate School
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The capability of an electromagnetic radiating system depends on its ability to operate effectively in a complex environment, where its pattern performance can be limited by pattern distortion effects. On a modern military ship, this task is complicated by the large number of systems that are competing for prime locations. It is recommended, therefore, that a given situation be studied systematically, looking at individual pieces of the problem separately and developing intermediate...
Topics: Electrical engineering, Modeling, Radio frequency, Radio wave propagation., Inverted Cone Antenna,...
Naval Postgraduate School
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This thesis identifies and analyzes labor market, economic, demographic, and geopolitical factors and trends which are believed to be important to officer accessions. A basic officer supply model is derived from an occupational choice model. The study specifies three different measures of officer supply: applications, new contracts, and accessions. Log-linear regression models using these three dependent variables are then estimated with ordinary least squares techniques. A basic hypothesis was...
Topics: Armed Forces,Officers, Armed Forces,Officers,Recruiting, Sailors., Officer supply models,...
Naval Postgraduate School
by Garrabrants, William M.; Ellis, Alfred W. III
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This thesis develops a comparative evaluation method for computer security risk management methodologies and tools. The subjective biases inherent to current comparison practices are reduced by measuring unique characteristics of computer security risk management methodologies. Standardized criteria are established and described by attributes which in turn are defined by metrics that measure the characteristics. The suitability of a method or tool to a particular organizational situation can...
Topics: Risk management, Risk assessment., Risk, risk management, risk assessment, risk analysis, computer...
Naval Postgraduate School
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Topics: UAV, RPV, Telemetry, Supermanueverability, Ducted-fan, Agility
This thesis is a tutorial for Command, Control, and Communications (C3) students and synthesizes the essence of electronic communications systems and related frequency spectrums into an integrated set of illustrations. The objective is to help the C3 student focus his or her attention on the performed operations and transformations in order to acquires a better understanding for the processes involved. The first major illustration show how the various components of a communication system are...
Topics: C2, C3 systems, Command and control, Fourier analysis, Radio waves, Telecommunication systems.,...
Naval Postgraduate School
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This thesis investigates several factors associated with the current military health benefit. These included: (1) beneficiary satisfaction with military as well as civilian medical treatment facilities, (2) the number of active duty military personnel who choose to use military facilities and the personal cost incurred in making that decision, (3) the number of active duty military personnel who would purchase civilian health insurance, (4) and the benefits of retaining the current military...
Topics: Management, Medicine, Research, Medical care, Military Health Care
Naval Postgraduate School
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This thesis reexamines the warfighting component of the Maritime Strategy in light of recent political changes in the communist world as well as recent arms control advances. The following conclusions are reached: first, a Conventional Forces Europe (CFE) agreement and the political changes in Eastern Europe will make mobilization and reinforcement key factors in any future European conflict. Secondly, under the conditions of a START agreement, it will no longer be necessary for the Soviet...
Topics: Sea control., Maritime strategy, U.S. Navy, National Strategy, European security
Naval Postgraduate School
by Seveney, James Arthur; Steinberg, Guenter Peter
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The U.S. Navy has recently embarked on a program called Next Generation Computer Resources (NGCR) whose aim is a cooperative effort between Navy and industry to field a set of state of the art computers for shipboard use in the late 1990's. One of the important features of NGCR is the use of commercial hardware developed to standardized protocol and ruggedized for military applications. This protocol provides for compatibility between machines. The machines themselves may be of any architecture...
Topics: Requirements engineering, Software engineering., Combat Direction Systems, Software Engineering,...
Naval Postgraduate School
by Beedenbender, Mark G.
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A widely used access control mechanism is the password. Passwords are normally composed of a meaningful detail, such as a name of a person or a sequence of numbers such as birthdate. Any person attempting to gain unauthorized access to a system might need only to look at a personnel record or associate with the person holding the desired password in order to discover the password. Therefore, there is a compromise between user memorability and security of a system. Exploration into other methods...
Topics: Computer security, Data protection., Information system security, authentication, user...
Naval Postgraduate School
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A performance comparison and tradeoff study was conducted between eight unique aircraft configurations for high performance light aircraft and remotely piloted vehicles. These configurations included conventional tractor, conventional pusher, canard, tandem-wing, joined-wing, and 3-surface designs, which were analyzed though the use of microcomputer-based performance and lattice-vortex programs. Actual experimental aircraft were utilized as models which were scaled to a useful load of 600...
Topics: Microcomputers, Aircraft design, remotely piloted vehicle, RPV, configuration, experimental aircraft
Naval Postgraduate School
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Three lower confidence interval estimation procedures for system reliability of coherent systems with cyclic components are developed and their accuracy measured using Monte Carlo techniques. The procedures use either the Poisson approximation to the Binomial distribution, the lower Binomial confidence limit procedure, or a modified procedure using the Poisson approximation to the Binomial distribution to obtain an equation for the lower confidence limit. The accuracy of the interval estimators...
Topics: Computer programs, Reliability, Cycles., lower confidence limit, coherent systems, cyclic components
Increasing budgetary constraints have prompted actions to reduce the maintenance cost of current naval aircraft. This thesis examines the Aircraft Engine Component Improvement Program (CIP), its impact on these cost at the organizational and intermediate levels of maintenance, and savings from these improvements. The objectives of the research were to identify current life cycle cost (LCC) models used by the Navy andor the other services to determine CIP benefits, to validate on-going...
Topics: Airplanes, Military, United States, Design and construction, Cost, Aircraft engine cost, lifecycle...
This thesis compares the four Intermediate Service Colleges (ISC) and the Defense Intelligence College (DIC) Phase I Joint Professional Military Education (JPME) curricula and student and faculty mixes. It asks the question, 'Is it feasible to offer a Phase I JPME curriculum at the Naval Postgraduate School?' The results clearly show that a Phase I JPME program is feasible if established within the National Security Affairs/Intelligence (NSA/I) and the Joint Command, Control and Communications...
Topics: Military education,Curricula,United States., Joint Professional Military Education (JPME)
Naval Postgraduate School
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This thesis presents the implementation issues of an ion propulsion subsystem (IPS) on a geosynchronous communications satellite. As an example, Ultra High Frequency (UHF) Follow-On class satellite is selected for this study. The issues include: (1) impact of integration of IPS with other subsystems, such as the electrical power subsystem to take care of the heavy demand of power requirements and location of the subsystem with least impact on attitude control and plume impingement on solar...
Topics: Ion rockets, Geostationary satellites., Ion propulsion, geosynchronous satellite, North-South...
This thesis discusses issues pertaining to the implementation of a mandatory direct deposit policy by the U.S. Navy. Research was concentrated on issues of concern to the afloat community and personal financial management. Availabilit: of cash underway, the impact of shipboard ATM's and the ability of the Navy's various afloat pay data entry systems to provide accurate and timely service in a direct deposit environment were analyzed. The personal financial management skills necessary for...
Topics: Direct Deposit System (DDS), Source Data System (SDS), Personal Financial Management, Automated...
Naval Postgraduate School
by Sablan, Susan R.
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This thesis establishes the importance of maintaining the quality of information in the Enlisted Master File (EMF). The Enlisted Master File is generated by the Navy Enlisted System, one of many applications which process data for the Manpower, Personnel, and Training community. To clarify what technologies, policies, and procedures can contribute to improved data quality, a framework for classifying these initiatives is developed. The data quality control environment of the Navy Enlisted...
Topics: Computer programming, Armed Forces, Personnel management., Data quality, data integrity, EMF
Naval Postgraduate School
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The Computer Aided Prototyping System (CAPS) and the Prototype system Description Language (PSDL) represent a pioneering effort in the field of software development. Execution Support System (ESS) within the framework of CAPS. The Static Scheduler is one of the critical elements of the ESS which extracts critical timing constraints and precedence constraints for operators and schedules the time-critical operators to guarantee that their timing constraints will be met. The Static Scheduler uses...
Topics: Real-time data processing, Production scheduling,Data processing., Hard real-time systems,...
Naval Postgraduate School
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This thesis examines the system implementation considerations of a resonance based radar target classification system. The basis of the system is the aspect and excitation independent property of electromagnetic scattering from a conducting body. Such a system consists of two components: pole extraction and annihilation filtering. The algorithms investigated here for these purposes are the Cadzow-Solomon pole extraction algorithm and the K-Pulse annihilation filter. Additionally, an...
Topics: Systems engineering, Electronics in military engineering., Natural Resonances, Noncooperative...
Naval Postgraduate School
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The development of a universal solution of the main problem in artificial satellite theory has only recently been accomplished with the aid of high powered computers. The solution to this long standing problem is an analytical expression that is similar in form to the two-body solution. An analysis is presented in which the solution is compared with the two-body solution, a proven numerical solution, and actual measured satellite data. The solution is shown to be significantly more accurate...
Topics: Aeronautics, Satellites, Astronautics, Oblateness, Perturbation, First Order Solution, Numerical...
In a computer simulation experiment, acoustic tomography is assessed as a means of measuring the seasonal flux of heat advected by the Norwegian Atlantic Current. Oceanic heat flux has traditionally been measured by various direct or indirect techniques that are prone to error or large uncertainty. The tomographic technique offers distinct advantages over conventional methods in that temperature and current fields, that combine to yield heat flux in the ocean, can be determined at various...
Naval Postgraduate School
by Wilson, Robert Eric
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This thesis is a continuation of research initiated by LCDR Daniel Ryan, SC, USN to establish a basis for defining words and terms used in the field of contracting. The twenty terms selected for this thesis were synthesized from collected definitions, Government regulations and contracting literature and reviewed once by National Contract Management Association Fellows in previous research efforts. This work differs from previous research in that it takes the terms from those efforts which...
Topics: Management, Contracts, Encyclopedias and dictionaries., Acquisition and Contracting Term...
This thesis describes a CAD compatible circuit model for an inductive strip with finite metal thickness centered in finline with wb=1. Scattering coefficients predicted by the circuit model are in good agreement with those predicted by an electromagnetic model based on Maxwell's equations. Filter simulations using the circuit model predict responses which are in good agreement with laboratory measurements.
Topics: Electrical engineering, Electronics, Computer-aided design.
Naval Postgraduate School
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This thesis describes the development and validation of a naval battle model which incorporates a tactical theory by Captain Wayne P. Hughes, Jr. Opposing forces are portrayed as aggregations of the staying power and combat power of their individual platforms. Attrition is modeled as a force-on- force process and is expressed in terms of the degradation of each force's combat power and staying power throughout the engagement, user variation of model inputs concerning the timing, direction and...
Topics: Naval warfare, Variations., Naval combat modeling, Model validation, Naval tactics
Naval Postgraduate School
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This theses is an evaluation of the Consolidated Automated Support System (CASS) to determine whether it is likely to solve a host of long-standing problems with use of automatic test equipment (ATE) for support of Naval aircraft. CASS is a new ATE program nearing the end of full scale development which will replace all current ATE systems and many smaller manual testers to form a single, general purpose test system for all intermediate level and some depot level avionic testing. It is intended...
Topics: Maintenance, Management, Testing., Automatic Test Equipment, ATE, Consolidated Automated Support...
Naval Postgraduate School
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This study examines the fundamental influence that culture has on the process and products of defense analysis and strategic planning. It demonstrates that culture, as the primary source of the policy-maker's epistemology, is an essential determinant of the outputs of the strategic planning process. Culture has this effect because strategic planning is nothing more than collection of considered judgments made through the perceptual lens created by one's own culture. The study looks at the...
Topics: Military planning, United States, Social values, United States., culture, acculturation,...
Naval Postgraduate School
by Lacson, Ernani Morena; Morgan, Harold R., Jr.
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The implementation of Total Quality Leadership (TQL) into the Surface Warfare Navy requires specific leadership training for the entire community. A training needs analysis was conducted to examine these training requirements for Surface Warfare Officers. First, personnel who are already using TQL at different Navy facilities were interviewed to determine the areas where TQL principles are applicable in the Surface Navy. Next, the Officer Survey Instrument (OSI) data base provided the...
Topics: Command Excellence Program, Executives, Leadership, Management and Education Training, Naval...
Naval Postgraduate School
by Chen, Tung-Sheng
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Classical edge detectors cannot handle the problem of noisy sonar track detection because they are too sensitive to noise. This thesis uses Simulated Annealing for the solution by formulating the sonar track detection problem as an optimization problem. the experimental results are much better than those of classical edge detectors. Fairly good results can be obtained on data with SNR down to -18 dB where most classical edge detectors fail.
Topics: Sonar, Noise., Simulated annealing, sonar track detection, combinatorial optimization
This study examines problems which the United States faces in its support of efforts by governments in less-developed countries (LDCs) to defeat revolutionary insurgents. The US has in the past been drawn into supporting conflicts for a protracted period, at increasing political, economic, and military cost, without receiving apparent benefit nor approaching a favorable end to the conflict. This thesis attempts to answer the questions of why the US encounters problems in its support of...
Topics: American, Counterinsurgency, Economic assistance, El Salvador, El Salvador., Low-Intensity...
Naval Postgraduate School
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Prior to 1987, the U.S. was the major supplier of ground, air, and naval weapons, and other military equipment to Thailand. Since 1987, Thailand has turned to the PRC for the purchase of weapons and equipment required for many of its armed forces modernization and force restructuring programs. In addition to the acquisition of large quantities of ground forces equipment for the Royal Thai Army (RTA), Thailand has also investigated the acquisition of PRC fighter aircraft for the Royal Thai Air...
Topics: National security, Logistics, Political science., Thailand-PAC, Arms Sales, Arms Transfers,...
This thesis examines the role and function of the Navy Office of Legislative Affairs (OLA) in the congressional program authorization process and the budget process. Specifically, the thesis addresses the following: (1) the defense budget process beginning with Department of the Navy administrative budget formulation at the headquarters level through congressional action in budget enactment, (2) the role and mission of the Office of the Navy Comptroller, providing an overview of the Navy's...
Topics: Budget, Legislation., Navy Office of Legislative Affairs, Budget Formulation, Authorization...
Naval Postgraduate School
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A wind-tunnel study to find the lift and drag characteristics of a low-aspect-ratio wingbody configuration from an angle of attack (AOA) of -8 to 50 degrees was conducted. A further study to find the comparative lift enhancement using the same wingbody with a close-coupled canard for wingbody angles of attack of 10, 22, 34, 40, and 48 degrees and canard deflection angles from -25 to 25 degrees was carried out. It was found that a properly-located canard enhanced the lift at all tested angles of...
Topics: Canard, Close-Coupled Canard, High Angle of Attack Aerodynamics, Vortex Interaction
Naval Postgraduate School
by Theodorelos, Susan Lynn
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NATO has a legitimate right to project force beyond the geographical boundaries of the NATO alliance. That NATO has been unwilling or unable to do so since 1949 results from a combination of factors relating to disagreements between the members over the geographical scope of the alliance, shifts in allied foreign policies and inter-allied tensions brought on by the Cold War. Iraq's invasion of Kuwait moved NATO's out-of-area problem from a subordinate position to the primary threat facing the...
Topics: Alliances, Geography., Out-of-Area, NATO, extra-European, collective security, alliances, NATO and...
This research was accomplished to perform a management problem analysis study of the Procurement Department at the National Naval Medical Center, Bethesda, MD. The goal of this research was to develop an organizational plan to increase small purchase productivity, improve quality of purchase documentation and strengthen customer service through improved utilization of personnel resources, increased levels of training, increased utilization of efficient procurement techniques and automation....
Topic: Medical care.
Naval Postgraduate School
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This thesis examines the feasibility of using an expert system approach to design an intelligent Weapon Suggestion System (WSS) to assist the Weapons Department Head (WDH) on board a naval warship in making accurate and efficient decisions in critical battle situations. We have analyzed the constraints of a WSS and the performance of on board weapons. We have also reviewed the related material previously published and discussed the implementation environment in this thesis. The system is...
Topics: Weapons systems, Evaluation, Systems engineering.
Naval Postgraduate School
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Previous measurements of thermoacoustic heat transport across stacks of short plates, called thermoacoustic couples or TACs, revealed serious discrepancies between theory and experiment. The discrepancies are worst at higher drive ratios (the ratio of the peak acoustic pressure amplitude at a pressure antinode to the mean pressure of the gas), where prominent irregularities in the data series appear. In the previous work, the measurements were made with thermopiles having junctions that were...
Topics: Heat, Transmission, Temperature, Thermodynamics, Pressure, Sound pressure, Thermopiles, Heat pumps,...
Deep water directional wave spectra, measured by an NDBC 3-meter buoy off Montery bay, are transformed to shallow water using a linear refraction model. The transformed directional spectra are compared with measured spectra using pressure gauge arrays in shallow waters at Marina and Santa Cruz. The classical Longuet-Higgins et al. (1963) method of computing directional wave spectra and a new exact Founrier coefficients representation method (Grauzinis, 1989) are used to compute directional wave...
Topics: Ocean waves., Ocean Waves, Directional Spectra, Wave Refraction
Naval Postgraduate School
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The Computer Aided Prototyping System (CAPS) was created to rapidly prototype real-time systems in order to determine if the system requirements can be met early in the development cycle. CAPS consists of several software tools that automatically generate an executable Ada model of the proposed system from a given specification. This thesis describes the development of a user interface for CAPS. The user interface supports the design, modification and execution of the software prototype...
Topics: Computer science, Computer-aided design., Prototyping Language, User Interface, Rapid Prototyping,...
Naval Postgraduate School
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The lessening of tensions between the United States and the Soviet Union have brought about projected reductions in defense spending and attendant manpower drawdowns. However, manpower analysts and policymakers in the Department of Defense and the services' secretariates are faced with frequent changes in world events that portend threats to the interests of the United States. At the same time, the supply and demographic complexion of American youth that is available to fill manpower needs is...
Topics: Manpower, Military planning, Soldiers, Demography, Emigration and immigration., Youth Labor Force,...
Naval Postgraduate School
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The maintenance of large military software systems is complex, involves users as well as software professionals, and requires appropriate management, which is one of the most important factors in efficient maintenance. Maintenance management requires information about the current state of the maintenance process that should be organized within a maintenance-oriented Enginering Database. This database should include all the necessary data about software changes, system configeration, maintenance...
Naval Postgraduate School
by Thornlow, Robert Timothy
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Several techniques for estimation of the power spectral density (PSD) , or simply the spectrum, of discretely sampled short data sequences are investigated in this thesis. These techniques are directly based on the fast Fourier transform (FFT) of the data sequence. However, an extrapolated version of the original data sequence will be used instead of the original. The aim is to enhance the resolution of the true spectral components of the signal without adding any false frequency components....
Topics: Electrical engineering, Electronic data processing., Data Extrapolation, Periodogram, AR spectral...
Naval Postgraduate School
by Garcia, Frank W., Jr.
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This study employs Synthetic Aperture Radar (SAR) imagery from the Marginal Ice Zone Experiment (MIZEX) 1987 to identify an optimal set of statistical descriptors that accurately classify three types of ice (first-year, multiyear, odden) and open water. Two groups of statistics, univariate and texture, are compared and contrasted with respect to their skill in classifying the ice types and open water. Individual statistical descriptors are subjected to principal component analysis and...
Topics: Sea ice, Synthetic aperture radar., Synthetic Aperture Radar, Sea Ice Classification, Marginal Ice...
A new formulation of electromagnetic wave scattering by convex, two dimensional conducting bodies was introduced. This formulation, called the On Surface Radiation Condition (OSRC) approach is based upon an expansion of the radiation condition applied directly on the surface of the scatterer. Past approaches involved applying a radiation condition at some distance from the scatterer in order to achieve a nearly reflection free truncation of a finite difference time domain lattice. Application...
Topics: Cylinders, Radiation, Surface radiation conditions, transverse electric, circular cylinders, hollow...
Naval Postgraduate School
by Kernen, Bernadette A.
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The purpose of this thesis is to identify problems in Navy reimbursable accounting and to develop a comprehensive, entry level financial management guide to assist financial managers at the field level in improving their accountability and control over reimbursable funds. This thesis discusses specific procedures for the effective administration and management of Intra- and Interservice Support Agreements, Economy Act Orders, and Project Orders as well as the problems peculiar to each. It...
Topics: Management, Accounting, Finance, Economics., Reimbursable Accounting, Financial Management
Naval Postgraduate School
by Kim, Heung-Taek
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We live in an age where the volume of paper-based information is steadily expanding. Personal computers have a great potential as tools for managing information. Effectiveness of using personal computers is determined by how easy it is to use them, since majority of the end-users are not computer experts. Compared with the advances in software design, the important issue of computer interface has begun to be addressed recently. There has been a research joining the database with the graphical...
Topics: Computer science, Computer programs, Microcomputers, Database management., Visual interface,...
A low-speed wind tunnel investigation was conducted to examine the vortex wake downstream of a three-percent scale model of the YF-17 lightweight fighter prototype at high angles of attack. The study was in support of NASA ames Research Center's wind tunnel investigation of a full scale FA-18 as part of NASA's High Alpha Technology Program. Smoke flow visualization was used to locate the downstream vortex wake. Hot-wire surveys were taken through the vortex at two stations; one directly aft of...
Topics: Engineering, Aerodynamics., High Angle-of-Attack Aerodynamics, Hot-Wire Measurements, Wind Tunnel...
Naval Postgraduate School
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This thesis investigates the use of current graphical interface techniques to build more effective computer-user interfaces to Operations Research (OR) schedule optimization models. The design is directed at the scheduling decision maker who possesses limited OR experience. The feasibility and validity of building an interface for this kind of user is demonstrated in the development of a prototype graphical user interface called TaskMaster. TaskMaster is designed as the Dialog component of a...
Topics: Scheduling., Scheduling, graphical user interface, DSS
Naval Postgraduate School
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Two recent computer programs, WRCOMP and ENGINE, by A. Mathur, were used to examine the performance to be gained by incorporating a wave rotor component in a turbofan engine with mixed exhausts. The programs were transferred to a VAX-2000 computer, extended, and test cases reported by A. Mathur were successfully reproduced. A comparison was made between ENGINE, in which real gas effects are accounted for, and ONX (by J. Mattingly) in which constant specific heats are used. The inclusion of real...
Topics: Aerospace engineering, Waves, Rotors., Turbofan Engines, Turbofan engines with a Wave Rotor
Naval Postgraduate School
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Resource Based Relative Value Scales (RBRVS) is a concept originating from the Harvard University School of Public Health which breaks procedures performed by physicians into components of work, training costs, and practice costs. The Medicare program is planning to implement a fee schedule based on RBRVS during fiscal year 1992 which will make some significant changes in medical care in the U.S. This thesis examines the applicability of RBRVS to the Civilian Health and Medical Program for the...
Topics: Medical care, Physicians, Medicare., RBVS, CHAMPUS, RBVS and CHAMPUS
Naval Postgraduate School
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The use of centrifuges in training aircrew to avoid GLOC is increasing. The purpose of this study was to record the vestibulo-ocular reflex (VOR) and subjective sensations to gain insight into reports of asymmetrical disorientation and disturbance during acceleration and deceleration of GLOC training centrifuges. Horizontal and vertical eye movements and post run sensations were recorded from 15 naive male human subjects seated head erect in a 20.5-ft radius pendulous chair centrifuge....
Naval Postgraduate School
by Russell, John L.
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This thesis compares the Army, Navy, and Air Force technology base programs for the purpose of identifying features of the Navy and Air Force programs that might benefit the Army. This study also examines three technology base issues to assess how well the Army's program responds to their concerns. As a result of these efforts, four recommendations are proposed to improve the Army's technology base resource allocation process.
Topics: Science, Technology., Technology base, research, exploratory development, advanced exploratory...
Naval Postgraduate School
by Wieman, Sharon A.
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The Split-window technique is based on the varying radiative properties of clouds and the atmosphere in different wavelengths of the primary infrared (IF) window. Channels 4 (11 micron) and 5 (12 micron) on the NOAA AVHRR are used to apply the technique to determine the differences between thick and thin cirrus and multiple layered clouds. The brightness temperature from channel 5 was subtracted from the brightness temperature from channel 4, resulting in a brightness temperature difference...
Topics: Cirrus clouds, Satellite meteorology, Dissertations, Academic, Meteorology., Meteorology, Satellite...
Naval Postgraduate School
by Calcote, Roy Keith.; Howard, Richard Anthony
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The main thrust of this thesis is the design of a usable Intelligent Computer Aided Instruction (ICAI) user interface that does not use a natural language processor and runs on a personal computer. Discrete Mathematics is the knowledge domain for this project and the Discrete Math Tutor (DMT) is the name of the tutoring system. The DMT will allow the average student to benefit from a tutoring system now and not have to wait until the artificial intelligence researchers solve the natural...
Topics: Artificial intelligence, Computer-assisted instruction., ICAI interface, intelligence computer...
A new method of array modeling which will be used to predict the performance of low frequency active sonar arrays is being investigated. In support of this effort, a network representation of a spherical shell piezoelectric transducer was developed. The transducer was modeled using the finite-element code MARTSAM, from which a nodal description of the transducer was obtained. A procedure was developed to reduce and transform the nodal description of the transducer into a spherical harmonic...
Topics: Physics., T-matrix, finite element model, MARTSAM, sonar array modeling
The nearfield acoustic intensity resulting from vibration transmitted from a main machinery foundation through supporting structure and fluid containing tanks into the hull structure, and then into the surrounding fluid has been studied for a scale model of a frigate ship. The scale model is 1:10 and the scaled frequency range is 640 Hz to 15 kHz. Acoustic pressure is measured on adjacent cylindrical contours close to the surface of the underwater vibrating surface with the fluid-containing...
Naval Postgraduate School
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This thesis deals with the economic issues associated with the presence of substandard threaded fasteners in the construction industry. It begins with an overview of the engineering concepts and terminology which will be used throughout the remainder of the report. A short discussion is presented outlining the various mechanical forces which act upon these fasteners in order to develop an appreciation for the seriousness of the problem. Past and present problems within the fastener industry and...
Topics: Game theory, Fasteners, Mathematical models., Threaded fasteners, substandard fasteners, game theory
Naval Postgraduate School
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The achievable gain in the radiation resistance and directivity of a low frequency underwater transducer due to the presence of an array of sympathetic resonators was analyzed. The resonators were all taken to be air bubbles, and both the resonators and transducer were taken to be compact (ka1) . The resonators were taken to be equally spaced around a circle of radius R, with the transducer located on the axis. The gain was calculated for various numbers of resonators as a function of ka...
Topics: Transducers, Resonators, Resonance., Low frequency active, multiple scatter, sympathetic resonance,...
Naval Postgraduate School
by Seo, Yong Seok
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The slot width required for conventional slotlines is very narrow when etched on low dielectric constant substrates. This poses fabrication difficulties and discourages the use of slotlines on these substrates. However, the slotline is finding increased applications in slot antennas. In order to feed the slot antennas, alternate structures must be found that relax the fabricational difficulties. Two such new structures are the bilateral slotline and the asymmetric slotline. In this thesis,...
Topics: Computer programs, Slot antennas., Characteristics of Single-Sided Slotline, Bilateral Slotline,...
Naval Postgraduate School
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Component breakout is the process of identifying and acquiring weapons systems components directly from the component manufacturer, and providing those components as government furnished equipment to a prime contractor for integration into an end item. This thesis was undertaken to examine and analyze current policy and guidance governing the component breakout program as it is currently structured within the DOD. Issues related to the adequacy and standardization of component breakout policy...
Topics: Armed Forces, Procurement, Management., Component breakout, component breakin, government furnished...
Naval Postgraduate School
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Travel time of an acoustic signal from transmitter to receiver provides a great deal of information about the ocean environment. Variations in the travel time of the signal may be caused by the changes in the sound speed along the path. Since sound speed is a function of pressure, temperature and salinity, measurement of this parameter in acoustic tomography provides a means to observe ocean fluctuations through the use of inverse techniques. The upcoming Heard Island Experiment will attempt to...
Topics: Ocean tomography, Underwater acoustics, Doppler radar, Hadamard matrices., Acoustic tomography,...
Naval Postgraduate School
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Evaluation of the SSMI HAC precipitation algorithm is presented. SSMI rain rate data from five passes during ERICA IOP 2 and 3 were compared to all available ship observations, dropwinsonde soundings and coastal radar. Four different techniques were applied to the seven SSMI channels to analyze rain rate. They are: SSMI HAC algorithm, the Tb(19H) GHz channel with a threshold of 160 deg K, the Tb(37H) GHz channel with a threshold of 190 K, and the Tb(37V- 37H) image with a threshold of less than...
Topics: Cyclones, Weather forecasting., Microwave, ERICA, SSMI, precipitation forecasting, rain
Naval Postgraduate School
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Current conventional Database Management Systems (DBMS) manage only alphanumeric data. However, data to be stored in the future is expected to include some multimedia form, such as images, graphics, sounds or signals. The structure and the semantics of the media data and the operations on that data are complex. It is not clear what requirements are needed in a DBMS to manage this kind of data. It is also not clear what is needed in the data model to support this kind of data; nor what the user...
Topics: Computer science, Management information systems, Systems engineering., Multimedia Database...
Naval Postgraduate School
by Pardue, Phillip C.
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The thesis describes an analysis of a Magnetic Anomaly Detection (MAD) buoy field. The analysis was based on estimates of the probability a submarine would be detected during an encounter with MAD buoy. The estimates were determined by using a simulation of both a crosscorrelation detection system and square law detection system. Using estimates, a random search model was used to determine a lower bound on the search effectiveness of a MAD buoy field. In doing this, the effects of false alarm...
Topics: Magnetic anomaly detection, MAD, detection models, search models, MAD buoy
Naval Postgraduate School
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The potential of a method to remotely measure near-surface currents and dominant wave spectra using Interferometric Synthetic Aperture Radar INSAR is demonstrated. INSAR consists of a single conventional SAR augmented by an additional receiving antenna. The phase difference between corresponding SAR image scenes observed by the antennas provides an interferogram directly proportional to the ocean surface velocity field. This direct motion detection by INSAR suggests a significant advance...
Topics: Synthetic aperture radar, Oceanography, Interferometric SAR, Scene coherence time, 2D wavenumber...
Naval Postgraduate School
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The effect of constant acceleration, prior to the establishment of a steady uniform flow, on some of the characteristics of the resulting time- dependent flow about a circular cylinder has been investigated numerically. It is shown that the occurrence of a local maximum drag is dependent on the parameters characterizing the non-impulsive nature of the ambient flow. However, the onset of the wake asymmetry and the evolution of the lift and drag forces during the transient period depend on the...
Topics: Hydrodynamics., Hydrodynamics, numerical calculations, wake, cylinder, impulsive flow
A Commander-in-Chief U.S. Pacific Fleet letter to the Chief of Naval Operations, dated September 12, 1989, contains a Command and Control Studies and Analysis Program (C2STAP) proposal for EHF line-of-sight communications. The purpose of this thesis is to address several of the issues raised by the C2STAP proposal by providing: an analysis of the inherent advantages and disadvantages of communications in the EHF spectrum, an analysis of the current and projected future state of EHF technology...
Topics: Millimeter wave communication systems, Command and control systems, Sea control., Millimeter wave,...
Naval Postgraduate School
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April and May of 1988 along the central California coast were characterized as a period of strong coastal upwelling produced by moderate to strong northwesterly winds present throughout the period. A product of this upwelling event was the manifestation of southward geostrophic currents which extended to a distance of approximately 50 km from the coast. From 08 to 11 May 1988, hydrographic surveying was conducted within the Monterey Bay. Internal waves, with amplitudes of up to 30 m were...
Topics: Ocean currents, California, Monterey Bay, Upwelling (Oceanography), Observations, currents,...
Naval Postgraduate School
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HY-80-steels are used in submarine and ship construction and it has been found that small additions of titanium to this steel during manufacture markedly improve the fracture toughness of the 'heat affected zone (HAZ) of Gas-Metal-Arc-Welding (GMAW) deposits made from this steel. This has been ascribed to prior austenite grain boundary pinning by titanium nitride inclusions. In the present work the weld metals, HAZ and parent metals of GMAW welds made on HY-S0 steels have been studied by...
Topics: Titanium Inclusions, HY-80 GMA Weld Deposits
This paper describes aircraft observations made with the NOAA P-3 research aircraft on 24 March 1989. The measurement region was over the marginal ice zone, southeast of Spitzbergen, between 74 to 76 degs N and 19 to 27 degs E. Above the atmospheric boundary layer, the geostrophic wind was 12 ms at approximately 15 deg off-ice. A well mixed layer extended along the entire 200 km flight path which was perpendicular to and centered over the ice edge. There was a stratocumulus layer over the ocean...
Topics: Boundary layer (Meteorology), Marine meteorology., Marginal ice zone
Naval Postgraduate School
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Two approximate interval estimation procedures for mechanical component reliability, P(XY), are developed and their accuracy evaluated by computer simulations. The strength, X, of the component and the stress, Y, applied to it are independent normally distributed variables with unknown means and variances. In the first interval procedure the variances are equal. In the second procedure the variances may be unequal. The derived intervals are quite accurate for the cases simulated which include...
Topics: Reliability., Reliability, Confidence Limit, Parametric, Normal, Unknown Means and Variances
Testability issues concerning the need for including Design for Testability (DFT) techniques in VLSI (Very Large Scale Integration) designs are discussed. Types of fault models, the use of fault simulation and the DFT techniques of Scan Path and Built in Test are described. An engineering methodology that uses the Genesil Silicon Compiler to produce a VLSI design, DFT-CHIP, which utilizes the DFT Scan Path technique is presented. Included are the procedures for using Genesil's simulation,...
Topics: Electrical engineering, Computer-aided design., Design for testability, VLSI, Genesil Silicon...
Naval Postgraduate School
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Multi-Frequency Modulation (MFM) has been developed at NPS using both differential quadrature-amplitude-modulation (DQAM) and differential quadrature- phase-shift-keying (DQPSK) encoding formats. This report discusses the use of each of these formats in transmitting a facsimile encoded message over a voice frequency channel. The satisfactory transmission and receipt of facsimile messages was achieved using both DQPSK and D16-QAM encoding formats. Research and testing for this report included...
Topics: Engineering, Signal processing., Facsimile, MFM, Communications
Naval Postgraduate School
by Whitaker, Michael J.
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In accordance with the 1988 Army Aviation Modernization Plan, the Army entered contractual agreement to begin acquisition of 2,253 UH-60 utility helicopters to replace approximately two-thirds of the 3,147 UH-1 aircraft destined for retirement. The plan foresaw the newer aircraft assuming the majority of the utility mission with the residual balance of UH-1 helicopters assuming a supplementary role. Because of subsequent budgetary considerations, the decision was reached to stop purchasing...
Topics: Operations research., semi-Markov, helicopter, Army Aviation Modernization Plan
Naval Postgraduate School
by Smith, Wallace Dean, Jr.
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The E-2C Hawkeye, a U.S. Navy aircraft, has experienced problems with fatigue cracks in its wings. This problem was studied in the laboratory using a representative specimen under simulated flight loading. Acoustic emission monitoring was used to detect the stress pulses emitted during cracking. A new wave analysis technique was applied in order to distinguish extraneous noise from crack growth. This technique distinguishes between the extensional and flexural waves in thin aluminum plates....
Topics: Engineering, Science, Aluminum, Fatigue., aircraft fatigue, aging aircraft, crack growth, 7075...
Naval Postgraduate School
by Brinkley, Douglas Edward; Scyoc, Paul Gordon
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The vast majority of information distributed throughout the Navy today is done so using various paper products in the form of manuals, printouts, books and other publications. Paper publications are inherently expensive to produce, store and distribute on a large scale. They are also difficult to use when extracting detailed information for ad hoc reports. Compact Disc, Read Only Memory (CD-ROM) technology provides an alternative means to publish and distribute information to large number of...
Topics: Database design., DC-ROM, database design, database distribution, optical publishing, pre-master
Naval Postgraduate School
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A symmetrical airfoil at fixed angle of attack from 0 to 35 degrees was placed in an air flow with controlled velocity oscillations at 10 Hz. The instantaneous pressure distribution and flow velocity were measured simultaneously. Pressure information was integrated numerically to determine instantaneous values for lift, drag and moment about the quarter chord. The results were plotted as three-dimensional surface plots in angle of attack, cycle time and performance coefficient axes, or with...
Topics: Cycles., Oscillating flow, aerodynamic coefficients, symmetrical airfoil
Naval Postgraduate School
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An acoustic tomography experiment consisting of a source near Hawaii and seven receivers along the west coast of North America was conducted from November 1987 to May 1988 and from February 1989 to July 1989. In this thesis, the acoustic ray travel times are analyzed in order to investigate inter-annual basin-scale thermal variability. These thermal fluctuations may help detect any greenhouse warming and greater understanding of them will increase knowledge of ocean-atmosphere interactions...
The goal of this thesis is to investigate the initial search planning phase of the Search and Localization Tactical Decision Aid (SALT) developed by METRON, Incorporated of McLean, VA. SALT is a Computer Assisted Search (CAS) program intended for use by P3 UPDATE IV crews to assist them in optimal deployment of a sonobuoy field to prosecute a submarine threat. The initial search planning phase of SALT takes as user inputs environmental data, an initial elliptical Search Probability Area, an...
Topics: Computer Assisted Search, Antisubmarine Warfare, Tactical Decision Aids
This thesis analyzes the organization and conduct of the Procurement Management Review (PMR) program within the Marine Corps Field Contracting System. An attempt is made to identify, to the maximum extent possible, the goals, management philosophy, organization, and methods considered to be ideal for PMR by three sources: literature, previous studies, and contracting professionals. An analysis and comparison between this consensus and HQMC's current PMR policies and procedures, as well as field...
Topics: Armed Forces, Procurement., Procurement management review (PMR), contract management review
Naval Postgraduate School
by Hatzopoulos, Epaminondas A.
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This report develops a modern naval combat model. It deals with naval surface missile combat and models the attrition as a force-on-force process described in discrete time steps, or slaves. The degradation of each force is expressed in terms of remaining staying power and combat power in both opponents. It is based on Lt. Beall's model, but since it deals with missile warfare it incorporates several human factors that affect the outcome of a naval battle: specifically scouting effectiveness,...
Topics: Naval art and science, Mathematical models, Naval battles, Naval tactics, War, Maritime...
Naval Postgraduate School
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This thesis analyzes data from the 1988 New Recruit Survey (NRS) sponsored by the United States Army Recruiting Command to study incentives that motivate new recruits to enlist in the United States Army. Our purpose is to use discriminant analysis and logistic regression to identify those incentives that have the greatest effect on enlistees in the prime recruiting market and to compare the results of these two methods. We believe that the incentives identified will differ between high quality...
Topics: Demography, Recruiting and enlistment., Enlistment, Incentive, Motivation, New Recruit Survey
Naval Postgraduate School
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Engineer command and control in a mechanized corps is a complex system. The current doctrine for engineer force structures is inadequate. Three command and control alternative force structures, identified in the Engineer Structure Study, are evaluated to determine which structure best supports a mechanized corps. The analysis is based on the results of a Stochastic, Timed, Attributed Petri Net timed stepped simulation. The model used in this simulation was constructed using an interactive...
Topics: Military planning., Land Warfare, Military Planning, Military Science, Petri Nets, Command and...
Naval Postgraduate School
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The comparison of fighting tactics in a high-resolution model from the JANUS(T) system is the primary purpose for this thesis. The scenario is fought between the South Korean Army Battalion Task force (called Blue) against a North Korean Mechanized Battalion (Red). Two courses of action for defense are analyzed in order to determine whether a static or dynamic tactic is better for the Blue force in a sector during the first thirty minutes of an invasion into South Korea. Attrition rates,...
Topics: Eigenvalues, Air warfare, JANUS(T), force ratio, Eigenvalue, Lanchester, weapon system values,...
Multi-Frequency Modulation (MFM) has been developed at NPS using both differential quadrature-phase-shift-keying (DQPSK) and differential-quadrature- amplitude-modulation (DQAM) encoding formats. Previous applications of these encoding formats were on industry standard computers (PC) over a 16-20 kHz channel. This report discusses the implementation of MFM to a voice frequency channel of 200-3400 Hz, for possible future use with high-speed modems over switched telephone networks. Research and...
Topics: Communications, Multi-frequency modulation, High-speed modems
Naval Postgraduate School
by Cevik, Ahmet Can; Durmaz, Seckin
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This research was undertaken to study the innovation process in organizations. The main objective was to provide insight on the dynamics of the innovation process in organizations which will help us construct a new perspective and framework in managing innovations within organizations. The interaction between technology and innovations, management of technological innovations, and innovation processes specific to the public organizations is explored. The hypotheses on innovation processes in...
Topic: Military planning, United States.
Naval Postgraduate School
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This thesis investigates the performance of various configurations of tactical High Frequency (HF) field deployable antennas in the presence of lossy earth. Antennas investigated include horizontal dipoles, short sloping wires, inverted vees, and monopoles with buried and elevated radials. Numerical models of the antennas are exercised via the Numerical Electromagnetic Code (NEC) for radiation pattern performance. Antennas are analyzed for applicability to (1) short-range Near Vertical Incident...
Topics: Computer simulation, Computer Simulation, Numerical Electromagnetics Code (NEC), Tactical HF Field...
Naval Postgraduate School
by Hovatter, Patrick J.
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The telephone is the most common and widely used electronic communication device in use today. Because of this, the military is heavily reliant on the telephone system and considers it the primary voice communications medium. Furthermore, recent technological advances will dramatically change the telephone as well as we know it today. This thesis will take a comprehensive look at the telephone in today's complex telecommunications environment. It will describe the technical aspects of...
Topics: Telephone, Telecommunication, Military telecommunication., telecommunications, phone
Naval Postgraduate School
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This thesis explores issues relevant to U.S./Japan burdensharing. As U.S. defense expenditures are reduced in the 1990's, U.S. allies will be called upon to contribute a greater share to meet common security responsibilities. Japan's government faces a multitude of constraints to increasing defense expenditures placed upon them by the U.S., the Japanese public and Japan's Asian neighbors. Some of these constraints are affected significantly by Japanese perceptions of U.S. commitment and the...
Topics: Burdensharing, U.S. / Japan Alliance, Economic Theories of Military Alliance, U.S. / Japan Relations
Naval Postgraduate School
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The Operations Research Department at the NPS plans to upgrade the hardware of the Personal Computer (PC) laboratory. The objective of the thesis is to analyze the potential upgrade paths dependent upon hardware availability, software compatibility, maintenance and initial cost. The alternatives are: (a) to upgrade the existing Zenith with a 80386 (CPU), (b) to buy the UNISYS desktop III system, or (c) to purchase the DELL SYSTEM-310. The study utilizes the economic cost/benefit view to examine...
Topics: Microcomputers., Present Value (P.V.), Cash flow diagram, Life-Cycle-Cost (L.C.C.), Discount rate,...
Naval Postgraduate School
by Green, Matthew John
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The author traces the organizational growth and change within the Israeli Defense Forces (IDF) over its 40-year history. A model is offered which depicts a military organization as an open system embedded within a changing environment. Selected inputs to this organizational system are shown to affect organizational structure and, in turn, the combat capabilities of the force. The author uses the five major Arab-Israeli wars as critical junctures in examining the IDF's organizational history....
Topics: Organization., Israel, Israeli, IDF, Organization, Structure, Organizational model, Principles,...
An improved method for deriving the timing information required for data recovery in the receiver of direct-sequence spread spectrum systems was implemented in hardware. This method uses a priori knowledge of the spreading sequence and its relation to the transmitted data to determine the precise beginning and end of data bits in the received signal. Testing of the hardware built for this research is concerned primarily with the performance of the circuit designed to provide the timing required...
Topics: Spread spectrum communications, Data recovery (Computer science), Data transmission systems.,...